Patent · US Active

Method for checking a temperature sensor in an SCR exhaust gas post-treatment system

US10301997B2 · kind B2 · utility

2Cited by

5References

7Claims

0Family size

Assignee

CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

Paul Rodatz · Landshut, DE
Michael Nienhoff · Regensburg, DE
Ingo Koops · Regensburg, DE
Tino Arlt · Regensburg, DE

Key dates

Filing date	Dec 17, 2014
Grant date	May 28, 2019
Priority date	—
Expiry date	Jan 9, 2036

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

The present disclosure describes a method for checking the signal of a temperature sensor in an exhaust-gas aftertreatment system for an internal combustion engine. The method may include: in an operating state which does not require heating of the reducing agent, activating the heating device for the purposes of checking the temperature sensor; determining whether the signal of the temperature sensor changes by a predefined expected value (ΔT) within a predefined time period (Δt2); provisionally identifying the temperature sensor as fault-free if it does; deactivating the heating device; determining whether the signal of the temperature sensor reaches the start temperature (T0) again within a time period (Δt3); and confirming the temperature sensor as fault-free if it does.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.